So I added a new port on the Turbo Express

[Nazi NecroPhile]

'FL' is for filter.... or Florida.

[thesteve]

its filter
they are a wire with ferrite beads on them

[turbokon]

What are they used to filter out?

Necro, I didn't FL stood for Florida too:)

[thesteve]

RF

[turbokon]

So do you think these filters are needed? Could this be a reason why the controller mods works on some expresses but not others?

[BlueBMW]

There was an old thread describing controller issues on expresses / GTs.  Those large black traces on top of the controller pcb sometimes lose continuity.  Ive had to bypass them on occasion.

[thesteve]

as have i
the easiest way is using a strand of wire.
lay the wire strand across the top of the dead trace.
solder both ends.
seal with nail polish (it secures and insulates the repair)

[turbokon]

I'm working on a turbo express that have this exact issue.

[Duo_R]

I realized I never did a video on the completed project for this. Coming soon...

[Fidde_se]

For my upcoming component guide of the GT/TE I have this:

If the conductive part of the rubber fails to be conductive even after being cleaned with alcohol,
Conductive Wire Glue can be used (www.wireglue.us) try to avoid conductive ink as it flakes off in time.

This can also be used for the pcb in the circular pcb pads as it's actually related to what nec used when they made
the pcb, you just have to be very careful as the circular pads are very fine and small, if done with care you may never notice
a optical difference upon inspection.

This is also used on some of the controllers for autofire (a couple black square parts) and some other controllers from this era,
some use circular pads in tin/copper and some use goldplated, but a lot of them use this very type of conductive pads.

Cheap pirate controllers conductive pads is dissolved with alcohol, both on the pcb and rubber pads but never seen it happen
 on the big companies controllers (nec/nint/sega.

[turbokon]

Thesteve finally determine why the external controller mod seems to work better under 5v (TE/GT operates at regulated 5v). The TE controller works by pulling low and high voltage while the console controller works by only pulling low voltage. For the external controller to work correctly on the TE, the high voltage must be block from pushing back into hu6280 by adding diodes between hu6280 and controller board connector at pins 2 to 5.

[Duo_R]

Any diagram to show the direction on the diodes? That is great news.

[thesteve]

the diodes should be pointing towards the chip on the controller board

[turbokon]

Should the on board TE controller still be working? Just tried this, the on board controller isn't working when no external controller is plugged in. However the external controller works fine when plugged.

[Duo_R]

That's odd

[Tatsujin]

[Duo_R]

Lol

[esteban]

Hahhahahaahaha. 

[turbokon]

LMAO:)

[thesteve]

Should the on board TE controller still be working? Just tried this, the on board controller isn't working when no external controller is plugged in. However the external controller works fine when plugged.

the internal should work fine with the external unplugged

[turbokon]

I got it working now. The diodes where facing the wrong direction.